Add user ID tracking for versions

app/models/VersionedModel.js

@@ -7,15 +7,16 @@ class VersionedModel extends Model {
             version_archive: [Object],
             version_num: { type: Number, default: 1 },
             version_create_date: { type: Date, default: () => new Date },
+            version_user_id: String,
         }
     }
 
-    async version_save(message = undefined) {
-        await this.new_version(message)
+    async version_save(message = undefined, user_id = undefined) {
+        await this.new_version(message, user_id)
         return this.save()
     }
 
-    async new_version(message = undefined) {
+    async new_version(message = undefined, user_id = undefined) {
         const version_data = await this.cast_to_version_data()
         version_data.version_UUID = uuid()
         version_data.version_message = message
@@ -26,6 +27,7 @@ class VersionedModel extends Model {
         this.version_num += 1
         this.version_archive.push(version_data)
         this.version_create_date = new Date()
+        this.version_user_id = user_id
     }
 
     async cast_to_version_data() {

app/models/api/Page.model.js

@@ -203,7 +203,7 @@ class Page extends VersionedModel {
 		this[`shared_users_${level}`].push(user._id)
 
 		// TODO replace user.uid with name of user when we support that
-		await this.version_save(`Shared with ${user.uid} (${level} access)`)
+		await this.version_save(`Shared with ${user.uid} (${level} access)`, user.id)
 		await user.save()
 	}
 
@@ -219,7 +219,7 @@ class Page extends VersionedModel {
 		this.shared_users_update = this.shared_users_update.filter(x => String(x) !== user.id)
 		this.shared_users_manage = this.shared_users_manage.filter(x => String(x) !== user.id)
 
-		await this.version_save(`Unshared with ${user.uid}`)
+		await this.version_save(`Unshared with ${user.uid}`, user.id)
 		await user.save()
 	}